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package my_network_test.feizuse;import java.io.IOException;import java.net.InetSocketAddress;import java.nio.ByteBuffer;import java.nio.channels.SelectionKey;import java.nio.channels.Selector;import java.nio.channels.ServerSocketChannel;import jav.

package my_network_test.zuse;import java.io.*;import java.net.Socket;import java.nio.charset.StandardCharsets;public class TCPClient { private final Socket socket; public TCPClient() throws IOException { int port = 4444; Str.

package my_network_test.zuse;import java.io.*;import java.net.InetSocketAddress;import java.net.Socket;import java.nio.channels.ServerSocketChannel;import java.nio.channels.SocketChannel;import java.util.concurrent.*;public class EchoServer { .